Let's roll up our sleeves and solve this. We have 355 and we're going to multiply it by 254, essentially adding 355 to itself 254 times.
Step 1: 0 + 355 = 355
Step 2: 355 + 355 = 710
Step 3: 710 + 355 = 1065
Step 4: 1065 + 355 = 1420
Step 5: 1420 + 355 = 1775
Step 6: 1775 + 355 = 2130
Step 7: 2130 + 355 = 2485
Step 8: 2485 + 355 = 2840
Step 9: 2840 + 355 = 3195
Step 10: 3195 + 355 = 3550
Step 11: 3550 + 355 = 3905
Step 12: 3905 + 355 = 4260
Step 13: 4260 + 355 = 4615
Step 14: 4615 + 355 = 4970
Step 15: 4970 + 355 = 5325
Step 16: 5325 + 355 = 5680
Step 17: 5680 + 355 = 6035
Step 18: 6035 + 355 = 6390
Step 19: 6390 + 355 = 6745
Step 20: 6745 + 355 = 7100
Step 21: 7100 + 355 = 7455
Step 22: 7455 + 355 = 7810
Step 23: 7810 + 355 = 8165
Step 24: 8165 + 355 = 8520
Step 25: 8520 + 355 = 8875
Step 26: 8875 + 355 = 9230
Step 27: 9230 + 355 = 9585
Step 28: 9585 + 355 = 9940
Step 29: 9940 + 355 = 10295
Step 30: 10295 + 355 = 10650
Step 31: 10650 + 355 = 11005
Step 32: 11005 + 355 = 11360
Step 33: 11360 + 355 = 11715
Step 34: 11715 + 355 = 12070
Step 35: 12070 + 355 = 12425
Step 36: 12425 + 355 = 12780
Step 37: 12780 + 355 = 13135
Step 38: 13135 + 355 = 13490
Step 39: 13490 + 355 = 13845
Step 40: 13845 + 355 = 14200
Step 41: 14200 + 355 = 14555
Step 42: 14555 + 355 = 14910
Step 43: 14910 + 355 = 15265
Step 44: 15265 + 355 = 15620
Step 45: 15620 + 355 = 15975
Step 46: 15975 + 355 = 16330
Step 47: 16330 + 355 = 16685
Step 48: 16685 + 355 = 17040
Step 49: 17040 + 355 = 17395
Step 50: 17395 + 355 = 17750
Step 51: 17750 + 355 = 18105
Step 52: 18105 + 355 = 18460
Step 53: 18460 + 355 = 18815
Step 54: 18815 + 355 = 19170
Step 55: 19170 + 355 = 19525
Step 56: 19525 + 355 = 19880
Step 57: 19880 + 355 = 20235
Step 58: 20235 + 355 = 20590
Step 59: 20590 + 355 = 20945
Step 60: 20945 + 355 = 21300
Step 61: 21300 + 355 = 21655
Step 62: 21655 + 355 = 22010
Step 63: 22010 + 355 = 22365
Step 64: 22365 + 355 = 22720
Step 65: 22720 + 355 = 23075
Step 66: 23075 + 355 = 23430
Step 67: 23430 + 355 = 23785
Step 68: 23785 + 355 = 24140
Step 69: 24140 + 355 = 24495
Step 70: 24495 + 355 = 24850
Step 71: 24850 + 355 = 25205
Step 72: 25205 + 355 = 25560
Step 73: 25560 + 355 = 25915
Step 74: 25915 + 355 = 26270
Step 75: 26270 + 355 = 26625
Step 76: 26625 + 355 = 26980
Step 77: 26980 + 355 = 27335
Step 78: 27335 + 355 = 27690
Step 79: 27690 + 355 = 28045
Step 80: 28045 + 355 = 28400
Step 81: 28400 + 355 = 28755
Step 82: 28755 + 355 = 29110
Step 83: 29110 + 355 = 29465
Step 84: 29465 + 355 = 29820
Step 85: 29820 + 355 = 30175
Step 86: 30175 + 355 = 30530
Step 87: 30530 + 355 = 30885
Step 88: 30885 + 355 = 31240
Step 89: 31240 + 355 = 31595
Step 90: 31595 + 355 = 31950
Step 91: 31950 + 355 = 32305
Step 92: 32305 + 355 = 32660
Step 93: 32660 + 355 = 33015
Step 94: 33015 + 355 = 33370
Step 95: 33370 + 355 = 33725
Step 96: 33725 + 355 = 34080
Step 97: 34080 + 355 = 34435
Step 98: 34435 + 355 = 34790
Step 99: 34790 + 355 = 35145
Step 100: 35145 + 355 = 35500
Step 101: 35500 + 355 = 35855
Step 102: 35855 + 355 = 36210
Step 103: 36210 + 355 = 36565
Step 104: 36565 + 355 = 36920
Step 105: 36920 + 355 = 37275
Step 106: 37275 + 355 = 37630
Step 107: 37630 + 355 = 37985
Step 108: 37985 + 355 = 38340
Step 109: 38340 + 355 = 38695
Step 110: 38695 + 355 = 39050
Step 111: 39050 + 355 = 39405
Step 112: 39405 + 355 = 39760
Step 113: 39760 + 355 = 40115
Step 114: 40115 + 355 = 40470
Step 115: 40470 + 355 = 40825
Step 116: 40825 + 355 = 41180
Step 117: 41180 + 355 = 41535
Step 118: 41535 + 355 = 41890
Step 119: 41890 + 355 = 42245
Step 120: 42245 + 355 = 42600
Step 121: 42600 + 355 = 42955
Step 122: 42955 + 355 = 43310
Step 123: 43310 + 355 = 43665
Step 124: 43665 + 355 = 44020
Step 125: 44020 + 355 = 44375
Step 126: 44375 + 355 = 44730
Step 127: 44730 + 355 = 45085
Step 128: 45085 + 355 = 45440
Step 129: 45440 + 355 = 45795
Step 130: 45795 + 355 = 46150
Step 131: 46150 + 355 = 46505
Step 132: 46505 + 355 = 46860
Step 133: 46860 + 355 = 47215
Step 134: 47215 + 355 = 47570
Step 135: 47570 + 355 = 47925
Step 136: 47925 + 355 = 48280
Step 137: 48280 + 355 = 48635
Step 138: 48635 + 355 = 48990
Step 139: 48990 + 355 = 49345
Step 140: 49345 + 355 = 49700
Step 141: 49700 + 355 = 50055
Step 142: 50055 + 355 = 50410
Step 143: 50410 + 355 = 50765
Step 144: 50765 + 355 = 51120
Step 145: 51120 + 355 = 51475
Step 146: 51475 + 355 = 51830
Step 147: 51830 + 355 = 52185
Step 148: 52185 + 355 = 52540
Step 149: 52540 + 355 = 52895
Step 150: 52895 + 355 = 53250
Step 151: 53250 + 355 = 53605
Step 152: 53605 + 355 = 53960
Step 153: 53960 + 355 = 54315
Step 154: 54315 + 355 = 54670
Step 155: 54670 + 355 = 55025
Step 156: 55025 + 355 = 55380
Step 157: 55380 + 355 = 55735
Step 158: 55735 + 355 = 56090
Step 159: 56090 + 355 = 56445
Step 160: 56445 + 355 = 56800
Step 161: 56800 + 355 = 57155
Step 162: 57155 + 355 = 57510
Step 163: 57510 + 355 = 57865
Step 164: 57865 + 355 = 58220
Step 165: 58220 + 355 = 58575
Step 166: 58575 + 355 = 58930
Step 167: 58930 + 355 = 59285
Step 168: 59285 + 355 = 59640
Step 169: 59640 + 355 = 59995
Step 170: 59995 + 355 = 60350
Step 171: 60350 + 355 = 60705
Step 172: 60705 + 355 = 61060
Step 173: 61060 + 355 = 61415
Step 174: 61415 + 355 = 61770
Step 175: 61770 + 355 = 62125
Step 176: 62125 + 355 = 62480
Step 177: 62480 + 355 = 62835
Step 178: 62835 + 355 = 63190
Step 179: 63190 + 355 = 63545
Step 180: 63545 + 355 = 63900
Step 181: 63900 + 355 = 64255
Step 182: 64255 + 355 = 64610
Step 183: 64610 + 355 = 64965
Step 184: 64965 + 355 = 65320
Step 185: 65320 + 355 = 65675
Step 186: 65675 + 355 = 66030
Step 187: 66030 + 355 = 66385
Step 188: 66385 + 355 = 66740
Step 189: 66740 + 355 = 67095
Step 190: 67095 + 355 = 67450
Step 191: 67450 + 355 = 67805
Step 192: 67805 + 355 = 68160
Step 193: 68160 + 355 = 68515
Step 194: 68515 + 355 = 68870
Step 195: 68870 + 355 = 69225
Step 196: 69225 + 355 = 69580
Step 197: 69580 + 355 = 69935
Step 198: 69935 + 355 = 70290
Step 199: 70290 + 355 = 70645
Step 200: 70645 + 355 = 71000
Step 201: 71000 + 355 = 71355
Step 202: 71355 + 355 = 71710
Step 203: 71710 + 355 = 72065
Step 204: 72065 + 355 = 72420
Step 205: 72420 + 355 = 72775
Step 206: 72775 + 355 = 73130
Step 207: 73130 + 355 = 73485
Step 208: 73485 + 355 = 73840
Step 209: 73840 + 355 = 74195
Step 210: 74195 + 355 = 74550
Step 211: 74550 + 355 = 74905
Step 212: 74905 + 355 = 75260
Step 213: 75260 + 355 = 75615
Step 214: 75615 + 355 = 75970
Step 215: 75970 + 355 = 76325
Step 216: 76325 + 355 = 76680
Step 217: 76680 + 355 = 77035
Step 218: 77035 + 355 = 77390
Step 219: 77390 + 355 = 77745
Step 220: 77745 + 355 = 78100
Step 221: 78100 + 355 = 78455
Step 222: 78455 + 355 = 78810
Step 223: 78810 + 355 = 79165
Step 224: 79165 + 355 = 79520
Step 225: 79520 + 355 = 79875
Step 226: 79875 + 355 = 80230
Step 227: 80230 + 355 = 80585
Step 228: 80585 + 355 = 80940
Step 229: 80940 + 355 = 81295
Step 230: 81295 + 355 = 81650
Step 231: 81650 + 355 = 82005
Step 232: 82005 + 355 = 82360
Step 233: 82360 + 355 = 82715
Step 234: 82715 + 355 = 83070
Step 235: 83070 + 355 = 83425
Step 236: 83425 + 355 = 83780
Step 237: 83780 + 355 = 84135
Step 238: 84135 + 355 = 84490
Step 239: 84490 + 355 = 84845
Step 240: 84845 + 355 = 85200
Step 241: 85200 + 355 = 85555
Step 242: 85555 + 355 = 85910
Step 243: 85910 + 355 = 86265
Step 244: 86265 + 355 = 86620
Step 245: 86620 + 355 = 86975
Step 246: 86975 + 355 = 87330
Step 247: 87330 + 355 = 87685
Step 248: 87685 + 355 = 88040
Step 249: 88040 + 355 = 88395
Step 250: 88395 + 355 = 88750
Step 251: 88750 + 355 = 89105
Step 252: 89105 + 355 = 89460
Step 253: 89460 + 355 = 89815
Step 254: 89815 + 355 = 90170

So, 355*254 = 90170